A practice manual for renewing Thai trade mark registrations. Three things differ here. The window opens only three months before expiry, the shortest among the major offices; fees are charged per item of goods rather than per class; and renewal is examined. Combined, they produce a situation where waiting for the window to open leads into a deficiency notice whose sixty-day response period runs past the end of the grace period.
1. At a glance
- System type
- Ten-year renewal cycle
- Anchor date
- Filing date, registration taking effect from it
- Due date rule
- Tenth anniversary of the filing date
- Renewal window
- 3 months before expiry — the shortest among major offices
- Grace period
- 6 months with a 20% surcharge
- Restoration
- None — cancellation leaves only refiling
- Fee basis
- THB 2,000 per item of goods
- Cap per class
- A flat THB 18,000 once a class reaches six items
- Examination
- Yes — a deficiency gives 60 days to respond, failing which the mark is cancelled
- Risk level
- High
2. Anchor date and due-date calculation
The anchor is the filing date. Registration takes effect from it, so expiry is fixed regardless of how long examination took.
Worked example
For a registration filed 2020-06-15.
| Item | Formula | Date |
|---|---|---|
| Window opens | Expiry − 3 months | 2030-03-15 |
| Renewal due | Filing + 10 years | 2030-06-15 |
| Grace ends | Due date + 6 months (20% surcharge) | 2030-12-15 |
| Deficiency response | Notice + 60 days | Depends on when notice issues |
| Next due date | Every 10 years thereafter | 2040-06-15 |
3. The window and examination
- The window opens three months before expiry, so have the papers and the power of attorney ready in advance.
- The request is examined as to form. Where a deficiency is found, a notice issues and must be answered within sixty days.
- Failing to answer means the renewal does not proceed and the registration is cancelled — do not close the matter on filing.
- Where nothing has changed and the list runs to thirty items or fewer, an expedited route is available.
- Where Thailand is designated through an international registration, renewal goes to WIPO.
4. Grace period and surcharge
| Item | Detail |
|---|---|
| Grace period | 6 months from the due date |
| Surcharge | 20% of the renewal fee |
| If missed | Cancellation — no restoration |
5. Fees — charged per item
The Thai renewal fee is charged per item of goods rather than as a flat amount per class. It rises with the number of items, but is capped at a flat THB 18,000 per class once a class reaches six items.
| Basis | Formula | Amount (THB) |
|---|---|---|
| Per item | Items × 2,000 | One item 2,000; five items 10,000 |
| Class cap | Flat once six or more items | 18,000 |
| Applied | The lower of the two | min(items × 2,000, 18,000) |
| Within grace | The above plus 20% | — |
6. Lapse and restoration
If the six-month grace period passes, or a deficiency notice goes unanswered, the registration is cancelled and no procedure revives it. Only refiling remains.
7. Management checklist
- The filing date, from which expiry is derived.
- The item count for the goods, without which no quotation can be produced.
- A separate reminder for the window opening three months before expiry, with papers completed beforehand.
- Do not close the matter on filing — a deficiency notice opens a fresh sixty-day deadline.
- Whether the case is a direct filing or a Madrid designation, since designations renew at WIPO.
- There is no restoration, so do not plan around the grace period.
Sources, cut-off date and disclaimer
This manual is based on iphere's August 2026 survey of country-by-country overseas maintenance rules, together with values produced by the deadline engine that runs on those same rules. Official fees and deadline rules change by office notice, so please confirm against the official source and your local agent before any actual payment or filing.